source: NonGTP/Boost/boost/python/detail/result.hpp @ 857

Revision 857, 4.2 KB checked in by igarcia, 19 years ago (diff)
Line 
1#if !defined(BOOST_PP_IS_ITERATING)
2
3// Copyright David Abrahams 2002.
4// Distributed under the Boost Software License, Version 1.0. (See
5// accompanying file LICENSE_1_0.txt or copy at
6// http://www.boost.org/LICENSE_1_0.txt)
7
8# ifndef RESULT_DWA2002521_HPP
9#  define RESULT_DWA2002521_HPP
10
11#  include <boost/type.hpp>
12
13#  include <boost/python/detail/preprocessor.hpp>
14
15#  include <boost/type_traits/object_traits.hpp>
16#  include <boost/mpl/if.hpp>
17
18#  include <boost/preprocessor/comma_if.hpp>
19#  include <boost/preprocessor/iterate.hpp>
20#  include <boost/preprocessor/debug/line.hpp>
21#  include <boost/preprocessor/enum_params.hpp>
22#  include <boost/preprocessor/repetition/enum_trailing_params.hpp>
23
24namespace boost { namespace python { namespace detail {
25
26// Defines a family of overloaded function which, given x, a function
27// pointer, member [function] pointer, or an AdaptableFunction object,
28// returns a pointer to type<R>*, where R is the result type of
29// invoking the result of bind(x).
30//
31// In order to work around bugs in deficient compilers, if x might be
32// an AdaptableFunction object, you must pass OL as a second argument
33// to get this to work portably.
34
35#  define BOOST_PP_ITERATION_PARAMS_1                                                                   \
36    (4, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/detail/result.hpp>, BOOST_PYTHON_FUNCTION_POINTER))
37#  include BOOST_PP_ITERATE()
38
39#  define BOOST_PP_ITERATION_PARAMS_1                                                                     \
40    (4, (0, BOOST_PYTHON_CV_COUNT - 1, <boost/python/detail/result.hpp>, BOOST_PYTHON_POINTER_TO_MEMBER))
41#  include BOOST_PP_ITERATE()
42
43template <class R, class T>
44boost::type<R>* result(R (T::*), int = 0) { return 0; }
45
46#  if (defined(BOOST_MSVC) && _MSC_FULL_VER <= 13102140)  \
47   || (defined(__GNUC__) && __GNUC__ < 3)                 \
48   || (defined(__MWERKS__) && __MWERKS__ < 0x3000)
49// This code actually works on all implementations, but why use it when we don't have to?
50template <class T>
51struct get_result_type
52{
53    typedef boost::type<typename T::result_type> type;
54};
55
56struct void_type
57{
58    typedef void type;
59};
60
61template <class T>
62struct result_result
63{
64    typedef typename mpl::if_c<
65        is_class<T>::value
66        , get_result_type<T>
67        , void_type
68        >::type t1;
69
70    typedef typename t1::type* type;
71};
72
73template <class X>
74typename result_result<X>::type
75result(X const&, short) { return 0; }
76
77#  else // Simpler code for more-capable compilers
78template <class X>
79boost::type<typename X::result_type>*
80result(X const&, short = 0) { return 0; }
81
82#  endif
83
84}}} // namespace boost::python::detail
85
86# endif // RESULT_DWA2002521_HPP
87
88/* --------------- function pointers --------------- */
89#elif BOOST_PP_ITERATION_DEPTH() == 1 && BOOST_PP_ITERATION_FLAGS() == BOOST_PYTHON_FUNCTION_POINTER
90# if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100)                      \
91        && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201)))
92#  line BOOST_PP_LINE(__LINE__, result.hpp(function pointers))
93# endif
94
95# define N BOOST_PP_ITERATION()
96
97template <class R BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class A)>
98boost::type<R>* result(R (*pf)(BOOST_PP_ENUM_PARAMS_Z(1, N, A)), int = 0)
99{
100    return 0;
101}
102
103# undef N
104
105/* --------------- pointers-to-members --------------- */
106#elif BOOST_PP_ITERATION_DEPTH() == 1 && BOOST_PP_ITERATION_FLAGS() == BOOST_PYTHON_POINTER_TO_MEMBER
107// Outer over cv-qualifiers
108
109# define BOOST_PP_ITERATION_PARAMS_2 (3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/detail/result.hpp>))
110# include BOOST_PP_ITERATE()
111
112#elif BOOST_PP_ITERATION_DEPTH() == 2
113# if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100)                      \
114        && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201)))
115#  line BOOST_PP_LINE(__LINE__, result.hpp(pointers-to-members))
116# endif
117// Inner over arities
118
119# define N BOOST_PP_ITERATION()
120# define Q BOOST_PYTHON_CV_QUALIFIER(BOOST_PP_RELATIVE_ITERATION(1))
121
122template <class R, class T BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class A)>
123boost::type<R>* result(R (T::*pmf)(BOOST_PP_ENUM_PARAMS_Z(1, N, A)) Q, int = 0)
124{
125    return 0;
126}
127
128# undef N
129# undef Q
130
131#endif
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